By K.A. Hobson, L.I. Wassenaar
Many questions in animal biology require the facility to trace animal circulation by utilizing multi-disciplinary and technological techniques. over the last decade, intrinsic chemical markers became in particular key within the research of migration. sturdy isotopes are a winning instance of instrinic markers that experience yielded new and beneficial insights into animal migration. This ebook offers a consolidated evaluation of the present knowlesge of strong isotopes in terrestrial migration examine questions, and to supply a pragmatic instruction manual for these contemplating utilizing solid isotopes of their migration learn. * offers details for readers to appreciate the right way to follow isotopic equipment for monitoring * severe details on components for destiny learn * useful instructions and discussions of pattern assortment, pattern guidance, isotope-ratio mass spectrometry information research, and problems with isotopic alternate and heterogeneity * superior realizing of information and statistical research in isotope-based reviews of migratory animals
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Additional info for Tracking Animal Migration with Stable Isotopes
For the uninitiated this can be confusing. 2 The average hydrogen isotopic (dD) composition of rainfall across the globe in the summertime. These large-scale and distinct isotope patterns are largely mirrored in plants and into upper-level trophic organisms and so form the basis for tracking animal movement. Vectors of seasonal migratory movement are often North-South and spanning large H isotopic gradients. The terrestrial global range of dD is over 300%, with a measurement precision of better than Æ2%.
The reader is referred to some key textbooks published over the last decade that cover in detail the scope of stable isotope theory and environmental applications (Kendall and McDonnell 1998, Criss 1999, Hoefs 2004). For students and newcomers to the field of stable isotopes, a good place to start for fundamental introduction and discussion of stable isotopes in the biosphere and hydrosphere are Stable Isotope Ecology (Fry 2006), Stable Isotopes in Ecology and Environmental Science (Lajtha and Michener 2007), Stable Isotope Geochemistry (Sharp 2007), and Environmental Isotopes in Hydrogeology (Clark and Fritz 1997).
The more negative dD values in older feather material near the tip) and then migrated southward into the United States during the fall (positive dD values toward the base), and was recaptured the following year in Canada long after the feather was fully grown. It is clear that as the feather was temporally extruded from the base, it gained more positive dD values as the eagle moved to more southerly locations, and essentially was recording a ‘‘net migratory track’’ within a single feather. 3 Illustration of measured intrasample hydrogen (dD) isotopic heterogeneity in migrating birds.
Tracking Animal Migration with Stable Isotopes by K.A. Hobson, L.I. Wassenaar